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Java > Open Source Codes > com > sun > org > apache > xalan > internal > xsltc > compiler > SimpleAttributeValue


1 /*
2  * Copyright 2001-2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 /*
17  * $Id: SimpleAttributeValue.java,v 1.6 2004/02/16 22:24:29 minchau Exp $
18  */
19
20 package com.sun.org.apache.xalan.internal.xsltc.compiler;
21
22 import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
23 import com.sun.org.apache.bcel.internal.generic.InstructionList;
24 import com.sun.org.apache.bcel.internal.generic.PUSH;
25 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
26 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
27 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type;
28 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;
29
30 /**
31  * @author Jacek Ambroziak
32  * @author Santiago Pericas-Geertsen
33  */
34 final class SimpleAttributeValue extends AttributeValue {
35
36     private String JavaDoc _value; // The attributes value (literate string).
37
38     /**
39      * Creates a new simple attribute value.
40      * @param value the attribute value.
41      */
42     public SimpleAttributeValue(String JavaDoc value) {
43     _value = value;
44     }
45
46     /**
47      * Returns this attribute value's type (String).
48      * @param stable The compiler/parser's symbol table
49      */
50     public Type typeCheck(SymbolTable stable) throws TypeCheckError {
51     return _type = Type.String;
52     }
53     
54     public String JavaDoc toString() {
55     return _value;
56     }
57     
58     protected boolean contextDependent() {
59     return false;
60     }
61
62     /**
63      * Translate this attribute value into JVM bytecodes that pushes the
64      * attribute value onto the JVM's stack.
65      * @param classGen BCEL Java class generator
66      * @param methodGen BCEL Java method generator
67      */
68     public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
69     final ConstantPoolGen cpg = classGen.getConstantPool();
70     final InstructionList il = methodGen.getInstructionList();
71     il.append(new PUSH(cpg, _value));
72     }
73 }
74
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